08316+3458 HU 716 (HD 71974)
08h 31m 35.03s +34° 57' 58.5" P.A. 42.00 sep 0.3 mag 7.58,9.02 Sp G5 dist. 28.22 pc (92.05 l.y.)
| Coord 2000 |
08316+3458 |
|
Discov num |
HU 716 |
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Comp |
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Coord arcsec 2000 |
08 31 35.03 +34 57 58.5 |
|
| Date first |
1904 |
|
Date last |
2009 |
|
Obs |
61 |
|
| Pa first |
105 |
|
Pa last |
42.1 |
|
P.A. Now (θ) |
121.9° |
|
| Sep first |
0.4 |
|
Sep last |
0.27 |
|
Sep. Now (ρ) |
0.482" |
|
| Mag pri |
7.58 |
|
Mag sec |
9.02 |
|
delta mag (ΔM) |
1.44 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
-006 |
|
| Pri motion dec |
+017 |
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Sec motion dec |
+017 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 71974 |
|
Constellation |
Lynx |
|
SAO |
60870 |
|
HIP |
41820 |
|
| Tycho2 |
2486-00303-1 |
|
Gaia DR2 |
903616971110812544 |
|
HD |
71974 |
|
GC |
11649 |
|
| ADS |
6851 |
|
BD |
BD+35 1834 |
|
Distance |
28.22 |
|
Distance ly |
92.05 |
|
ORBITAL ELEMENTS
| Period (P) | 31.3y | |
Periastron (T) | 1984y | |
Semi-major axis (a) | 0.41a | |
| Eccentricity (e) | 0.71 | |
Inclination (i) | 120° | |
Longitude of periastron (ω) | 243° | |
| Node (Ω) | 143° | |
Notes | n | |
Reference | Sod1999 | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
97.3 |
0.440 |
| 2001 |
93.7 |
0.422 |
| 2002 |
89.7 |
0.403 |
| 2003 |
85.3 |
0.383 |
| 2004 |
80.3 |
0.361 |
| 2005 |
74.8 |
0.339 |
| 2006 |
68.4 |
0.317 |
| 2007 |
61.2 |
0.296 |
| 2008 |
52.9 |
0.276 |
| 2009 |
43.4 |
0.259 |
| 2010 |
32.5 |
0.244 |
| 2011 |
20.5 |
0.232 |
| 2012 |
7.3 |
0.222 |
| 2013 |
352.7 |
0.209 |
| 2014 |
335.3 |
0.183 |
| 2015 |
303.7 |
0.108 |
| 2016 |
182.8 |
0.099 |
| 2017 |
152.4 |
0.219 |
| 2018 |
142.4 |
0.306 |
| 2019 |
136.4 |
0.367 |
| 2020 |
131.9 |
0.411 |
| 2021 |
128.2 |
0.443 |
| 2022 |
124.9 |
0.466 |
| 2023 |
121.9 |
0.482 |
| 2024 |
119.0 |
0.491 |
| 2025 |
116.2 |
0.495 |
| 2026 |
113.4 |
0.495 |
| 2027 |
110.6 |
0.491 |
| 2028 |
107.8 |
0.484 |
| 2029 |
104.8 |
0.473 |
| 2030 |
101.7 |
0.460 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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